tracking: one ledger, one authority — prune protection and replace-vs-add answered from the same records, fail-safe on unreadable state

src/shell/actions/prune_action.h

@@ -4,9 +4,9 @@
 // module. Registration/dispatch for its FOREVER-STABLE id (BANK_PRUNE_FOLDER) stay
 // with bank_actions; one guarded body here.
 //
-// Contract (preserve exactly): dry-run first; abort outright on unreadable usage
-// records (fail-safe); confirm-with-manifest before any deletion; opens NO undo
-// point and writes NO ext state (file deletion is not REAPER-undoable).
+// Contract (preserve exactly): dry-run first; abort outright when the tracking
+// authority reports a block (fail-safe); confirm-with-manifest before any deletion;
+// opens NO undo point and writes NO ext state (file deletion is not REAPER-undoable).
 
 namespace reasampler {